Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 209-599-5 | CAS number: 587-26-8
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
No effects on toxicity to aquatic algae up to the limit of water solubility.
Key value for chemical safety assessment
Additional information
No data for toxicity to aquatic algae are available for Lanthanum carbonate. Therefore, data from the analogue approach source substance Cerium carbonate were applied.
The toxicity to Scenedesmus subspicatus was investigated with Cerium carbonate over a period of 72 h according to OECD 201 (Bätscher 2007). An undiluted filtrate of a supersaturated dispersion with the loading rate of 100 mg/L and the dilutions 1:2, 1:4, 1:78, 1:16 and 1:32 of the filtrate were tested. At the start of the test, the concentrations of Cerium measured in the dilutions 1:4, 1:2 and in the undiluted filtrate were 1, 2 and 4 µg/L, respectively corresponding to 1.6, 3.3 and 6.6 µg Cerium carbonate/L (i.e. test item without water content). After 24, 48 and 72 hours test duration, the measured concentrations of cerium in these media were below the limit of quantification of 1 µg Cerium/L (corresponding to 1.6 µg Cerium carbonate/L). The EC50(72h) and NOEC value were stated as > 100 mg/L and 25 mg/L, respectively. The inhibition of algal growth was presumably caused by a secondary effect, the complexation of the essential algal nutrient phosphate by the test item. The measured concentration of phosphate in the undiluted filtrate of the dispersion stirred for seven days was much lower than in the test water. A statistically significant decrease of the phosphate concentration was determined at the loading rates of 50 and 100 mg/L. Thus, the growth inhibition determined at these loading rates may have been caused by depletion of phosphate in the test medium.
Further information about the analogue source substances can be found in the data matrix of the justification for the analogue approach, which can be found either in the CSR or as attachment in Iuclid section 13.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
